Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Brickhouse Dudley PlcfiledCriticalBrickhouse Dudley Plc
Priority claimed from PCT/GB1981/000027external-prioritypatent/WO1981002405A1/en
Application grantedgrantedCritical
Publication of ATE7371T1publicationCriticalpatent/ATE7371T1/de